Life for former United Nations investigator Gerry Lane and his family seems content. Suddenly, the world is plagued by a mysterious infection turning whole human populations into rampaging mindless zombies. After barely escaping the chaos, Lane is persuaded to go on a mission to investigate this disease. What follows is a perilous trek around the world where Lane must brave horrific dangers and long odds to find answers before human civilization falls.
For nine years, Patrick, Jack and his daughter Lu have outlasted the zombie apocalypse by shutting themselves off in the snowbound town of Harmony. The monsters have seemingly disappeared, with no sign of other survivors, but the constant fear of the unknown is starting to take a toll on this makeshift family. When Patrick goes scavenging for food, he discovers the undead have returned and evolved into something terrifying, beyond imagination. Will the last breath of the human race survive a second zombie apocalypse?